Bests Rock Instrumental: Jessica, Allman Brothers. There's one that lyrics would ruin.
As for lyrics, I much prefer songs with lyrics, at least if I can understand most of the lyrics. The gargling razorblades school of vocals doesn't only leave me cold, it makes me leave.
Rock songs with great lyrics? Too many to list I think. Sympathy/Stones, Night Moves/Seeger, Jack & Diane/Mellencamp, man there's LOTS of them.